On completing a minimal install of Centos, you often find that there are quite a few unwanted services started by default.
I like to disable the folowing with the commands:
/sbin/chkconfig xfs off
/sbin/chkconfig isdn off
/sbin/chkconfig gpm off
/sbin/chkconfig pcmcia off
/sbin/chkconfig sendmail off
/sbin/chkconfig cups off
/sbin/chkconfig portmap off
/sbin/chkconfig nfslock off
/sbin/chkconfig netfs off
/sbin/chkconfig rpcgssd off
/sbin/chkconfig rpcidmapd off
/sbin/chkconfig autofs off
/sbin/chkconfig lm_sensors off
